Cassia adjusts the switch on the pneumatic sword to keep his temperature within a suitable range, which is also within a range that he can withstand at present. The surgical development of the arm's heat resistance has not been completed, and half of the process has been completed, but due to physical condition, it is still possible to use pneumatic weapons within a minimum range for three or four minutes.

"Swish!" The red and hot sword body made a sharp sound when it touched the ice layer. White steam suddenly gushed out from the contact surface of the two. After rising to a height of several meters, most of the steam turned into slowly falling frost powder at the cold temperature. Only a small part of the steam rose into the sky.

It is not a good idea. As the steam gathers, it is only a matter of time before they rise to the sky and become a more eye-catching signal. Cassia seizes the time and slowly cuts the ice layer under her feet in an orderly manner. Whenever a sensation of ablation comes from her arms, she closes the pneumatic sword and cools down the ice layer next to her arms. It also alleviates the gathering of steam to a certain extent, so that it will not soon become a conspicuous target.

From time to time, when the enemy completes the search for the vacant area, he will definitely think that he has run to the top of the mountain. If he had not completed his plan before, Cassia thought that his result would not be very good. The firepower of the ten airships was something he could not resist. He could use the bullets of the machine gun to slowly deplete his life in a few minutes.

The results of most half an hour did not satisfy Cassia. The effect of pneumatic weapons in the face of the century-old ice was not very significant due to the power limitations of use. These ice layers also had steel-like hardness and colder than the air sword itself. They only went downward for about two meters deeper, and the distance between the more clear the lava was less than three meters, but the cutting speed became weaker.

There was only a dark red light that was refracted by the ice a hundred times and a thousand times. With the "hissing" sound, Cassia was holding a pneumatic sword like a machine, and patiently cutting the ice layer under her feet bit by bit. The black condensed lava was right in front of her. As long as the dark and cold ice layer under her feet was destroyed, you could touch them.

Cassia let out a breath at this time, and like a gas valve released, spitting out all the fatigue and pressure in her body. She raised her head and the sky above had turned into a dim color. It was evening now, and it was a few hours before she came here.

"The enemy has probably discovered it." Cassia thought, with a crisp sound of shattering, the ice layer under her feet cracked, and his few kicks made the cracks on it expand, and the cutting speed of the pneumatic sword became faster. A scent of sulfur broke through the blockade of the ice layer one step ahead, and with the smell of being frozen for hundreds of years, it spread around.

The ice layer was finally cleaned up by Cassia without any surprise. There was already some temperature on the condensed lava. Below the rock was the terrifying energy that had been accumulated for a long time, and a slight vibration could be felt from close contact. Take out another radiant tube, Cassia dug a small hole in the condensed lava, put the musket below, so as to better transmit the electricity in the radiant tube. Be prepared, Cassia stood up in a narrow space, avoiding the sharp ice that had frozen again, and crawled up.

Halfway through, countless sound waves pressed down from the sky. The sound source took the shape of a hexagram, surrounding him. The movement immediately accelerated, and Cassia's body seemed to flow up along the digging ice pit, and in a short moment he came to the edge of the circular device.

Without any hesitation, he took out the hexaplastic rod on his body and inserted it directly into a hole in the device. The hazy white light had not yet expanded the range, and a piece of orange-red appeared on the crater out of thin air and smashed it hard towards the dark blue ice layer. Here it became a hot spring with strange colors, and the fire was refracted through the ice, shaped like a dream.

Then the machine gun bullets separated in the air with bunches of light red lines and exploded first on the ice layer. The fine ice cubes splashed up and before they fell, they turned into scattered steam as the flames and heat waves generated by the explosion of the air gun.

The expanded fireballs eventually turned into thick black smoke, surging and rising in the impact of mutual criticism. The cannon bullets tore them apart again, reducing the thickness of the ice layer layer by layer.

"Calculate the wind direction and launch all the cloud bombs." In the control room, a calm voice sounded.

In just less than half a minute, more than a dozen huge steel blocks were projected from the six airplanes. They were ignited in the air, and the tails of the flames became slightly bent in the strong wind, but it did not affect their smooth explosion in the limelight.

The white jellyfish-shaped powder spread out almost at the same time, and the wind made them overlap together, forming a huge, seamless net, and the thick smoke rolling down below was even covered by this color. According to the precise calculations of the analysis machine, at the moment when the powder network was completely covered over the crater, several sparks flashed.

"Boom--" The sound waves dissipated, all the white powder was ignited, and the huge fireball was like the substance and fell into the inside of the crater. The concave geographical environment aggravated the power of this explosion. The fireball was catalyzed by its own impact and heat after a few seconds. A huge pillar of fire rushed into the dim blue sky, and the transparent shock wave spread from the top of the mountain, as if the bullets hit the air cavity formed by the water. The impact even found its shape on the thunder cloud below. A huge wave of ripple rushed around the mountain as the center, and only disappeared after two or three thousand meters. The thick thunder cloud was almost dispersed and pressed down to a height of about ten meters, which completely offset the power of close-range impact.

The mountain vibrated, and the ice cracked and slid downward. However, the attack did not stop there. In this short period of time, all six airships unfolded the steel decks used to disguise, revealing several neatly staggered bomb launch holes on the side. The bombs ejected their heads from the flames from the launch holes, impacting towards the source of the fire column below.

The expanded flames seemed to have a chemical reaction, shaped like they were also shattering the explosion species of bombs. The column of fire finally turned into mushroom-shaped clouds of smoke, unfolding layer by layer, rolling towards the higher sky.

"The remaining ammunition is 80%, 70%, 50%, 50%, 20%, 20%, 20%, 20%, 20%, 20%, 20%, 20%, 20%, 20%, 20%, 20%, 20%, 20%, 20%, 20%, 20%, 20%, 20%, 20%, 20%, 20%, 20%, 20%, 20%, 20%,

"The remaining 30% is reserved for backup, and the rest is emitted. When the smoke spreads, I don't want to see anything complete below." Il interrupted Stien, and with a flashing face, he stood at the window, quietly watching the scene below. It seemed as if he was admiring the paintings of famous artists in the museum, with an addiction and unconscious joy in his eyes.

The small sky was illuminated by fire, and a layer of hot red plated on the rocks and airships on the top of the mountain. The impact of the explosion disturbed the wind direction, and the smoke mixed with the flames, tearing and fusion were performed in Il's eyes.
Chapter completed!